Barry Connor is a black belt who executed this choke.
This is what he wrote about it:
“The new choke I developed (as far as I know lol)…
It is just about a No-gi baseball choke but reversed. A standard baseball choke would not be possible to finish from a standing position. This choke enters front to back rather than back to front and uses “C“grips rather than an “s” grip.. the finish is similar to the baseball choke with an elbow to elbow, but I have never seen this one pulled off Or taught before”